com.neeve.server.mon
Enum SrvMonDisruptorWaitStrategy

java.lang.Object
  java.lang.Enum<SrvMonDisruptorWaitStrategy>
      com.neeve.server.mon.SrvMonDisruptorWaitStrategy

All Implemented Interfaces:

Serializable, Comparable<SrvMonDisruptorWaitStrategy>

@Generated(value="com.neeve.adm.AdmEnumeration",
           date="Wed Mar 28 10:54:31 EDT 2018")
public enum SrvMonDisruptorWaitStrategy
extends Enum<SrvMonDisruptorWaitStrategy>

The strategy used by a disruptors EventProcessor to wait for new events to process.

Enum Constant Summary

Blocking
Blocking strategy that uses a lock and condition variable.

BusySpin
Busy Spin strategy that uses a busy spin loop.

Sleeping
Sleeping strategy that initially spins, then uses a Thread.yield(), and eventually for the minimum number of nanos the OS and JVM will allow.

Unknown
Indicates the claim strategy in use is invalid or not recognized

Yielding
Yielding strategy that uses a Thread.yield() after an initially spinning.

Field Summary

static SrvMonDisruptorWaitStrategy[]	EMPTY_ARRAY A preallocated empty array used to avoid garbage when returning empty arrays.
int	val
static List<SrvMonDisruptorWaitStrategy>	VALUES A zero garbage alternative to values().

Method Summary

static SrvMonDisruptorWaitStrategy	fromCode(int code) Gets the value corresponding to the provided int 'code' value.
static SrvMonDisruptorWaitStrategy	fromCodeString(String value) Gets the value corresponding to the provided 'code' value in its String form.
static SrvMonDisruptorWaitStrategy	fromValue(int val) Gets the value corresponding to the provided 'constant' value.
String	getCodeString() Gets the code value for this enumeration as a String.
static Class<?>	getCodeType() Gets the code type with which this enumeration was generated.
static boolean	hasValue(int val) Tests if the passed in value represents a 'constant' in this enumeration.
static SrvMonDisruptorWaitStrategy	valueOf(String name) Returns the enum constant of this type with the specified name.
static SrvMonDisruptorWaitStrategy[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

Blocking

public static final SrvMonDisruptorWaitStrategy Blocking

Blocking strategy that uses a lock and condition variable.

This strategy should be used when CPU resources are more important that latency or throughput.

Sleeping

public static final SrvMonDisruptorWaitStrategy Sleeping

Sleeping strategy that initially spins, then uses a Thread.yield(), and eventually for the minimum number of nanos the OS and JVM will allow.

This strategy is a good compromise between performance and CPU resource. Latency spikes can occur after quiet periods.

Yielding

public static final SrvMonDisruptorWaitStrategy Yielding

Yielding strategy that uses a Thread.yield() after an initially spinning.

This strategy is a good compromise between performance and CPU resource without incurring significant latency spikes.

BusySpin

public static final SrvMonDisruptorWaitStrategy BusySpin

Busy Spin strategy that uses a busy spin loop.

This strategy will use CPU resource to avoid syscalls which can introduce latency jitter. It is best used when threads can be bound to specific CPU cores and is appropriate for low latency or throughput intensive apps for which there are sufficient CPU cores.

Unknown

public static final SrvMonDisruptorWaitStrategy Unknown

Indicates the claim strategy in use is invalid or not recognized

Field Detail

VALUES

public static final List<SrvMonDisruptorWaitStrategy> VALUES

A zero garbage alternative to values().

EMPTY_ARRAY

public static final SrvMonDisruptorWaitStrategy[] EMPTY_ARRAY

A preallocated empty array used to avoid garbage when returning empty arrays.

val

public final int val

Method Detail

values

public static SrvMonDisruptorWaitStrategy[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (SrvMonDisruptorWaitStrategy c : SrvMonDisruptorWaitStrategy.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static SrvMonDisruptorWaitStrategy valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

hasValue

public static final boolean hasValue(int val)

Tests if the passed in value represents a 'constant' in this enumeration.

Parameters:

val - The value to test for.

Returns:

true If this enumeration has the given 'constant' value.

fromValue

public static final SrvMonDisruptorWaitStrategy fromValue(int val)

Gets the value corresponding to the provided 'constant' value.

Parameters:

val - The 'constant' value to look up.

Returns:

The value corresponding to the constant value

Throws:

IllegalArgumentException - if the provided code is not a valid code for this enum

fromCode

public static final SrvMonDisruptorWaitStrategy fromCode(int code)

Gets the value corresponding to the provided int 'code' value.

Parameters:

code - The int 'code' value to look up.

Returns:

The enumeration value corresponding to the 'code' value

Throws:

IllegalArgumentException - if the provided code is not a valid code for this enum

fromCodeString

public static final SrvMonDisruptorWaitStrategy fromCodeString(String value)

Gets the value corresponding to the provided 'code' value in its String form.

Parameters:

value - The String 'code' value to look up.

Returns:

The enumeration value corresponding to the String 'code' value

Throws:

IllegalArgumentException - if the provided code is not a valid code for this enum

getCodeType

public static final Class<?> getCodeType()

Gets the code type with which this enumeration was generated.

Returns:

The code type (Character.class, Integer.class, or String.class)

getCodeString

public final String getCodeString()

Gets the code value for this enumeration as a String.

Returns:

the code value for this enumeration as a String.